jdbc - Glassfish 2.1 never reuses statements with Postgresql and Eclipselink? -


we using glassfish server 2.1 eclipselink jpa 2.1 , connect postgresql database 8.4.8. problem in log file of postgres see prepare of statements created em.createquery or em.createnamedquery. seems no statement has been prepared reused. therefore performance bad.

i tried setting default jdbc setting preparethreshold 5 1. changed unnamed statements named. still not reused.

i tried several settings connection pooling prepared statements connection dependent returned default org.postgresql.ds.pgsimpledatasource , javax.sql.datasouce.

i enabled statement caching in persistence.xml:

<property name="eclipselink.jdbc.cache-statements" value="true"/>

does glassfish 2.1 support statement caching? , if settings missed?

any hints appreciated.

considering this: http://www.youtube.com/watch?v=hfx_m0p0kom seems 2.1 not support statement caching.


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